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Five small cylindrical ceramic fuses with metal end caps

Bussmann

Bussmann S505-500-R Ceramic Fuse 500mA 250V 1.5kA 5pk

SKU CH-R7RT-4H2E4

Ceramic time-delay fuse rated 500 mA at 250 V AC with a 1.5 kA interrupt rating, supplied in a pack of five

  • Time-delay protection prevents nuisance trips
  • 500 mA rating suits low-current circuits
  • 250 V AC voltage rating for mains use
  • 5 kA interrupt capacity clears faults safely
  • Ceramic body withstands high temperatures
  • Pack of five fuses for multiple replacements

Bussmann S505-500-R Ceramic Fuse Pack

The Bussmann S505-500-R is a ceramic, time-delay fuse rated at 500 mA and 250 V AC with a 1.5 kA interrupt rating. Each cylindrical fuse measures 20 mm in length and 5 mm in diameter. The pack contains five non-indicating, non-rejection fuses suited for general circuit protection.

For low-current AC circuit protection

These fuses suit technicians and maintainers protecting equipment drawing up to 500 mA on 250 V AC lines where a time-delay characteristic is required. They are not for applications needing a visual blown-fuse indicator, a rejection-style body to prevent misinsertion, or a higher interrupt capacity than 1.5 kA at 250 V AC.

Five-fuse pack for spares and replacements

The package quantity of five provides immediate replacements for standard 5 x 20 mm fuse holders and compatible HTB series fuse blocks. The ceramic body and BSI, CCC, CSA, IMQ, SEMKO, UL, VDE certifications support use in compliant equipment designs.

How it compares

Measured against everything we stock in Breakers & Circuit Protection, at today’s prices. Recalculated every night.

Price $24.99
Cheaper than about 75% of the 1,135 comparable items (median $54.99).

Specifications

Product
Brand nameEATON BUSSMANN

Questions about this item

What fuse block series is compatible with the 20 mm × 5 mm S505 ceramic fuse?

The HTB fuse block series accepts the 20 mm long, 5 mm diameter ceramic body of this S505 fuse.

Can this time-delay fuse replace a Littelfuse 215 or Mersen GSF in the same holder?

Yes — the S505 is listed as equivalent to the Littelfuse 215 and Mersen GSF series, so it fits the same 5 × 20 mm holder.

How can I verify the fuse is intact after installation without an indicator?

Because the fuse is non-indicating, use a multimeter to check for continuity across the ceramic body after fitting it.

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